Los hidrocarburos aromáticos monocíclicos: benceno, tolueno, etilbenceno y xileno (BTEX), presentes en crudo refinados de petróleo, hacen parte los compuestos con más impacto el medio ambiente la salud humana, debido a su naturaleza cancerígena, mutagénica altamente tóxica. Esta investigación tuvo como objetivo obtener caracterizar bacterias capaces degradar tolueno. Se realizaron tres muestreo...

In this study the full-scale operation of soil flushing with air sparging to improve the removal efficiency of petroleum at depths of less than 7 m at a military site in Korea was evaluated. The target area was polluted by multiple gasoline and diesel fuel sources. The soil was composed of heterogeneous layers of granules, sand, silt and clay. The operation factors were systemically assessed us...

Delivery of sulfate to petroleum hydrocarbons (PHCs) source zones and groundwater plumes is desirable enhance biodegradation rates when treatment has become limited due depletion sulfate. Sulfate land application involves spreading salts on ground surface allowing their dissolution infiltration into subsurface. The objectives this pilot-scale investigation were capture the vertical transport be...

[no abstract available]

the tumors in which odontogenic differentiation is fully expressed are the odontomas. odontomas are considered as hamartomas rather than a true neoplasm. these tumors are composed of enamel, dentine, cementum and pulp tissue. it is most commonly associated with the eruption of the teeth. they are usually discovered on routine radiographic examination. in exceptional cases, the odontoma erupts i...